Means protecting buckstays against overheating



c. OTTO 2,778,783

MEANS PROTECTING BUCKSTAYS AGAINST OVERHEATING Jan. 22, 1957 Filed May 26, 1953 (E LU v I v v M q m\ 1 L T J l/IIII 455!!! z h United States MEANS PROTECTING BUCKSTAYS AGAINST OVERHEATING The present invention relatcs to the Construction of horizontal coke oven batteries of the general type now customarily employed in the production of metallurgical coke. In such coke oven batteries, horzontally elongated heating walls alternate with coking chambers along the length of the battery, and vertical metallic buckstays which cngage the heating wall ends directly, or through flash plates, oppcse the horizontal elongation of the heating walls.

The general object of the present invention is to provide simple and effective means for protecting the end wall buckstays from overheating. Each buckstay is in position to receive heat radiating from each coke oven door adjacent the buckstay, and from the usual door frame sur- -ounding the mouth of each adjacent coking chamber end. Each buckstay is also subject to -a heating efiect as a result of the leakage of hot gas from an a-djacent oven chamber into contact with or in unduly close proximity to the buckstay.

In accordance with the present invention, I interpose a heat shield between each vertical side of the buckstay and the adjacent portion of the coke oven structure which might otherwise transmit an undesirably large amount of heat to the buckstay.

The various features of novelty which characterize my invention are pointed ont with particularty in the claims annexed to and forming a part of this specification. For a better Understanding of the invcntion, however, its advantages, and specific objects attained with its use, refercnce should be had to the accompanying drawings and descriptive matter in which I have llustrated and described a preferred embodiment of the invention.

Of the drawings:

Fig. l is a cross section through a portion of a coke oven battery of convcntional type, except for its inclusion of buckstay protection against overheating;

Fig. 2 is a small scale elevation in section on the line 2-2 of Fig. 1, of a portion of a buckstay and associated heat shield shown in Fig. 1; and

Fig. 3 is a View illustrating a modification of a portion of the apparatus shown in Fig. 1.

In the form of the invention shown in the drawings by way of example, parallel horzontally elongated heating walls A alternate with parallel horzontally elongated coking chambers E along the length of a coke oven battery structure of conventional type. The vertical corners of the brick work surrounding each coking chamber mouth is recessed to receive a metallic door frame member C surrounding the mouth or end portion of the corresponding coking chamber B. The mouth of each coking chambcr is normally closed by a coke oven door D. As shown, the door D is of known type comprisng an outer metallic structure E and an inner or plug section e. The latter consists mainly of non-metallic refractory material held in place by metallic brackets ea attached to the outer door structure E and sccuring the door sections E and e in fixed relation to one another. As shown, each metallic aren't' outer door section E comprises a plate-like portion EA transvcrse to the door axis, and having a peripheral rim portion EB which is parallel to the door axis. In the normal closed position of the door, the rim portion EB is transverse to and overlaps -a portion of the outwardly facing scaling surface CA of the door frame C.

In the constructon shown, the joint between each door B and associated door frame C is normally sealed by a scaling element F in the form of a thin metallic band. The outer portion of the band F surrounds and is presscd against the peripheral door portion EB by clamping elements G Secured to said portion EB. The inner portion of the scaling element F extends inwardly from the inner side of the door structure E and thus overlaps portions of the metallic brackets ea. Each door frame C is anchored in place by clamping elements J shown as of known type. Each clamping element J has one end in engagement with the outer side of the adjacent portion of the base flange ia of a buckstay I, and has its other end in engagement with the outer face of the adjacent door frame C. As shown, a flash plate IA is interposed between the base flange 'a of the corresponding buckstay I and the end surface of the adjacent heating wall A. The flash platcs IA are wider than the buckstay flangcs ia, and each flash plate side edge projects outwardly away from the adjacent edge of the fiange ia. Each clamping element J is directly connected to the corresponding flash plate ia by a bolt j which extends through an intermediate portion of the element and has its inner ends attached as by a welding or threadcd cngagenient to the plate IA. Each member i has a nut or a head portion hearing against the outer side of the corresponding element J. Insofar as above described, the Construction illustrated in Fig. l includes nothing claimed as novel herein. V

As indicated in Fig. 2, each heat shield I( extends longitudnally of the adjacent buckstay across all or most of the space between the adjacent inner and outer buckstay fianges i and ia, respectivcly. Ordinarily and as shown, each heat shield K is mechanically connected to and supported by the I-bcam I which it protects. Thus, as shown, the outer edge portion of the heating shield K and the adjacent outer edge portion of the ange i are connected by elbow-shaped bracket elements L. Each bracket elcrnent L has one end alongside and bolted or otherwise attached to the adjacent buckstay flange z', and has its other end alongsi-de and bolted, riveted or otherwise attached to the adjacent portion of the shield K. The inner edge of the shield K is not attached to the buckstay flange ia, but is formed with open ended slots or notchcs Ka through which pass the hook portions of the corresponding clamping parts J. As shown, the outer edge of each heat shield K is spaced away from the *adjacent buckstay flange i so that hot air may readily pass out of, and cooler air may pass into, the vertical channel defined by the heat shield K, the adjacent buckstay flanges and ia and the main central web portion of the adjacent buckstay.'

In accordance with the present invention, a heat shield K is advantageously used to protect each buckstay I against overheating by the heating action of each coke oven door and door frame alongside the buckstay. Thus in the case of all but the end buckstays of the battery, a separate heat shield K is advantageously provided at each side of each buckstay. With a modern coke oven structure including door frames C of the type shown, and outer metallic door parts E, EB and F, the heat radiation from the door and door frame parts to buckstays at each side of each coke oven door, is substantial and increases the advantages obtained by the use of the heat shelds K.

At times gas may leak through the joint between the heating wall masonry and the side of the door frame C remotc from the door portion e surroundcd by the door may be varied. While it is not essential that each sheld' K should be connected to and supported by the buckstay which it protects, such connection is practically desirable. As shown, the connecting elements L ,are simple and effective. When those elements are relatively thin and flexible as they may be, they are well adapted to prevent objectionable distortion or displacement of the sheld memberstK in the event that the buckstays are bowed as a result of.

the expansion of the coke oven masony. Thus for example, the supporting member L shown in Fig. 1 may be replaced by the member La shown in Fig. 3. The member La is in the form of a yoke having its body portion transverse to and in engagement with the outer side of the outer flange of the I-beam I. The transverse ends or leg portions of the member La bear against the inner sides of the corresponding shields K as do the leg portions of the member L shown in Fig. 2. In the arrangement shown in Fig. 3, each member La is clamped to the edge portions ofthe outer I-beam flange by hook members M which have their body portions extending through the body portion of the member A threaded for engagement by clamping nutswhch normally bear against the outer side of the body portion of the member La. At its inner end, each member M is formed with ahook portion arranged to engage the inner side of the adjacent edge portion of the fiange. With theconstructionshown.

in Fg. 3, the I-beam flange i is not weakened by rivet holes. Furthermore, relative warpage or -deformation of the fiange i and the shie1ds.K may be compensated for if and when necessary, by the use of washers orshims interposed between the flange 'and the hook ends of the members M or between said fiange and the nuts threaded on structure proper, as my means. of anchor bolts extending into the masonry.

While in accordance With the provisions of the statutes, I 'have illustrated and described the best form of embodiment of my invention now known to me, it will be appar-v ent to those skill'ed in the art that changes may be made in the form of the apparatus disclosed without departing from the spirit of my invention as set forth in the appended claims and that in some cases certain features of my invention may bensed to advantage without a corresponding use of other features.

Having now described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. In a coke oven battery structure comprising horizontal coking chambers, heating walls alternating with the cokng chambers along the length of the battery, end walls having openings therein to provide access to said coking chambers, and vertical buckstays anchored to the battery structure and bearing against the ends of the heating walls, the combination with said buckstays of vertical heat shields each interposed between a buckstay and the coke oven opening adjacent the buckstay and in position to substantially restrict the transfer of heat to the buckstay from said adjacent oven opening, said heat sheld being fixedly operatively, Secured at one edge and being free at its opposite edge.

2. In a coke oven battery structure comprisng horizontal coking chambers, heating walls alternating with the coking chambers along the length of the battery, end walls having openings therein to provide access to said coking chambers, and vertical buckstays anchored to the battery structure and hearing against the ends of the heatingwwalls, the comb'ination with said .buckstays of vertical heat shields each interposed between a buckstay and coke oven openings adjacent the buckstay and in position to substantially restrict the transfer of heat to the buckstay from said adjacent oven opening, said heat sheld being fixedlyf operatively Secured at one edge to the outerportion of said buckstay and the other edge thereof being free and' unhaving openingstherein to provide access to said coking.

chambers, and vertical'buckstays anchored to the battery structure and-bearing against-the ends ofthe heating walls, the combinaton with said buckstays of vertical heat shields each interposed between a buckstay and the coke oven opening adjacent the buckstay and in position to .substantially restrict the transfer of heat to the buckstay from said adjacentoven opening, said sheld being in the form of a thin metal'strip fixedly operatively Secured at its outer edge to the outer portion of said buckstay and having its other edge free and unsecured, said other edge of said strip being provided' With vertically displaced openings for the passage ofelements operative to connect the buckstayto an adjacent door frame element and anchor the latter 'in the battery structure.

References Cited in the file of this patent UNITED STATES PATENTS 233,120 Smith V Oct; 12, 1:880 238,182 SWindell Feb. 22, 1881 242250 Battelle May 3'1, 1881 1,320,387 Griggs Nov; 4, 1 919 1,331,989 Griggs Feb; 24, 1920: 1,449,795 Thornton Mar.. 27, 1923 2,157,569 Potter May 9, 1939 2,668,075 Van Ackeren et al Feb. 2, 1954` FOREIGN PATENTS 117,964 Australia Mar. 27, 1923 

1. IN A COKE OVEN BATTERY STRUCTURE COMPRISING HORIZONTAL COKING CHAMBERS, HEATING WALLS ALTERNATING WITH THE COKING CHAMBERS ALONG THE LENGTH OF THE BATTERY, END WALLS HAVING OPENINGS THEREIN TO PROVIDE ACCESS TO SAID COKING CHAMBERS, AND VERTICAL BUCKSTAYS ANCHORED TO THE BATTERY STRUCTURE AND BEARING AGAINST THE ENDS OF THE HEATING WALLS, THE COMBINATION WITH SAID BUCKSTAYS OF VERTICAL HEAT SHIELDS EACH INTERPOSED BETWEEN A BUCKSTAYS AND THE COKE OVEN OPENING ADJACENT THE BUCKSTAY AND IN POSITION TO SUBSTANTIALLY RESTRICT THE TRANSFER OF HEAT TO THE BUCKSTAY FROM SAID ADJACENT OVEN OPENING, SAID HEAT SHIELD BEING FIXEDLY OPERATIVELY SECURED AT ONE EDGE AND BEING FREE AT ITS OPPOSITE EDGE. 